If I try to shut down normally using the on/off in the corner, a little wheel starts spinning in the middle of the screen and stays there and stays there and stays there. Finally after about 2 hours I did a hard boot and shut it down. But when I go to turn it off again the same thing happens??? Every time I try to turn it off the screen goes black and the little white wheel in the middle spins and just stays there...Any suggestions??? Thank you for any insight.